請問為什麼X會是2A+B+kI的反矩陣

2 -1 1 -4 A = ,B: , = X是一個二階方陣,k為一常數, -3 2 -1 0 若滿足BX+2AX-B=A-kx的X不存在,則k=2or-11 6-457, Txa-c 4b-d, 751-

高一 三角函數，想問一下這三題謝謝~

18. 若△ABC 的內角∠A與B滿足sinA=-cosB且∠A+∠B=130°,則∠ A= [8] 19. 設 sin1014°=k,則tan246° -66 S=k. Sk.-14. 51-R St.-2 = 【 歲 】。 20. 設 180° <<270°,試化簡√sin²0+(1+sine sina. |S|+|ts| = 45. 85. 0 -66

There, you can sit “enjoying “the night view. 請問這是要填enjoyed 還是enjoying ？

求求這題怎麼算，我很想知道這種題目我到底要怎麼去運算，我應該要先找出什麼，這種題目我真的每一次寫每一次都不會，誰可以教教我謝謝🙇‍♀️🥲

01 k kol ( ) 6.已知30°C時,氯酸鉀的溶解度為10克/100克水。將30°C時,所配製的 44克飽和氯酸鉀溶液蒸乾後,共可得到氯酸鉀固體多少克? (A) 2 (B) 3 (C) 4 (D) 4.4 (E) 5.

不懂為什麼第三個選項可以這樣寫，是如果機率相同就可以這樣寫他們的關係式嗎？ 以下附上答案題目與解析謝謝。

5. 袋中有大小相同,編號1到7號的球各1球。小昱自袋中隨機一次取出三 球,每顆球被取出的機率均等。設隨機變數 X 為取出三球中的最大號碼,隨 機變數Y為取出三球中的最小號碼,請選出正確的選項。 3 (1)P(X=4)= 35 (3)Y=-X+8 (5)Var(X)=Var(Y) (2)P(X=5)=P(Y=3) (4)E(X)=E(Y) 數 15 天

求解🙏🏻

6、設 0°<<90°,若tan8+ 1 25 sin cos 0 = tan 12 1-25000030 #tang²+ 25 = tang 4 -3 3 -4 12tang+12=25 tan 12tang-25 tano +12-0 (4tane-3) 13tan 9-4)=0 > 1- tan 9 = 3√ 4 = Sing

解答上說小球在水平方向不受外力作用所以質心水平位移為0，但是碗壁不是會給球正向力嗎？碗不是應該向右移嗎？

ACD 如右圖,一個質量 m 的小球自半徑為R的半球形碗邊 緣靜止釋放,若碗與地面、小球與碗之間的摩擦力 略不計,已知碗的質量M,則下列敘述哪些正確? (A)小球滑至底部的過程中,小球與碗的質心水平位移為 零 (B)小球滑至底部的過程中,小球與碗的質心鉛直位移為零 (e)小球滑至底部的過程中,碗的位移量值為 mR m+M R 2mR 容量 (D)小球滑至碗另一端最高處的過程中,碗的位移量值為 (E)小球滑至底部的過程中,小球與碗的質心位移量值為 m+M MR m+M 。 〔明倫高中]

請問第25題為什麼不能選B🙏

of the United 全新試題 建國中學 鳳山高中 ◎第四段課文重點 (B) in show love for others (C) through TV programs. (D) upon 全新試題 (1)介系詞應用 (2)副詞應用 (3)名詞子句 23 23. Studying history (A) likes (B) dislikes traveling in time to the past; we can learn from the past and avoid making the same mistakes. 全新試題 (C) is like (D) is alike and achieve more. 新營高中 (C) farther (D) further (24. I ask you to keep climbing because you will see (A) far D③The 25. The plan change it. (B) fur we expand our business all over Asia sounds risky, so I think we should 全新試題 different (A) that 新試題 III. 綜合測驗 are very ※第一篇 峰高中 高中 (B) which (C) what (D) about which 1. to Established in 1984, TED is a nonprofit foundation that helps spread new ideas around the world. In the beginning, the foundation held conferences and invited thinkers from many different come and speak. Some speakers were experts and researchers in medicine. Others were knowledgeable 2. were highly respected giants in business. Each of them was given eighteen philosophers. minutes to present their ideas. The speakers' talks were filled with valuable and fun insights that often audiences with knowledge 3. entertainment. popular. 4. they did not really start a revolution of

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求解

(A) We are expected (C) What is expected (B) It is expected (D) It will expect 2. Last year, the festival attracted many people, and the number of tourists is a peak on the day of the fireworks display. reported (A) that reached (C) to reach (B) to have reached (D) that has reached